Mostly from Latin

fission

hessian

mission

passion

Prussia

Russia

session

accession

admission

aggression

commission

compassion

compression

concession

concussion

confession

depression

digression

discussion

emissions

expression

impression

obsession

omission

oppression

percussion

permission

possession

procession

profession

progression

recession

regression

remission

repression

secession

submission

succession

suppression

transgression

transmission

decompression

dispassionate

dispossession

intercession

intermission

readmission

repercussions

repossession